Reminder to add Ysgramor's Teeth as a landmark north of the Rift, add a barrow with the mentioned heroes. From Songs of the Return (ESO additions, but usable):

Gurilda led her crew to the foothills of a lofty range of mountains. These they named Ysgramor's Teeth and long they sought a pass through them. When finally a way was found, the crew crossed over and into a new land. "The Rift" they called this region, for it was riven by deep canyons and swift-flowing rivers. In the name of Fallowfire, their lost Companions, and Yngol, they scoured the land, burning Mer villages and putting all they encountered to the axe.

Finally, the Mer offered battle. The cowardly Elves gathered in great numbers high atop a rocky hill, daring Gurilda's Companions to attack. And so they did. Challenges were offered, brave deeds were done, and heroes made. Battle raged through the day and as the sun touched the peaks of the western mountains, the Mer broke and fled. Gurilda lay dying, pierced by a multitude of weapons, but lived until sunset. Her spirit ascended to Sovngarde knowing her crew was victorious.

That day, the dominion of Elves over the Rift was ended. The Companions claimed the land in the name of Ysgramor, Harbinger of us all, and made it free to all Nords. To honor their dead, the Companions labored long, delving into the hillside to craft a tomb. Gurilda was buried there, with all her weapons and armor. There too were placed the remains of Bergitte the Toothless and Kajord Eagle-Eye, laid alongside Gurilda as they had fallen in battle, defending their captain. Others of the honored dead were entombed as well. A mighty cairn of stone was erected around the tomb entrance, to forever mark the grave.

Vikord One-Ear, long Gurilda's first mate but now captain, gazed long upon the hills rising about them and the valleys at their feet. This was a land he could love, where his people could prosper and grow. He decreed the crew's wandering at an end and caused a great hall to be built on the battle site. Thus was Fallowstone Hall created, in homage to the ship that carried them to these shores. From this time, the days of the Companions of the Rift are counted. Never may their glory fade!